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WASHINGTON — Construction on Westlight, a luxury condo development at 23rd and L streets Northwest, is entering its final stages and the developers are ready to start marketing the condos.

But potential buyers will have to dig deep: The condos will hit the market priced at $625,000 to $4.5 million. The development has replaced the former West End Public Library and a D.C. police station.

Westlight, with its unusual asymmetric architectural design, is a 10-story, mixed-use development that will also include ground floor retail.

The 71 condos range in size from 600-square-foot, one-bedroom residences to 3,000-square-foot, three-bedroom homes, some of which will be among the priciest condos in the District.

Westlight includes a 25-meter heated rooftop pool and sun deck, fitness center, club room and business center, and underground parking.

Behind the development is architect Enrique Norten of Mexico City-based TEN Arquitectos, whose other recent works include the New York Public Library, Miami Design District and Rutgers Business School.

The building also includes plans for a new state-of-the-art 21,000-square-foot public library.

Next door is another structure, called East Tower, that has 93 luxury rental units with its own entrance and lobby.

Developer EastBanc says the condos will deliver in spring of 2017.

The Westlight design is described as a “distinctive, cantilevered glass building facade bathed in natural sunlight.”

The 328,000-square-foot building is also LEED-certified.

EastBanc is also developing an apartment building just a block away, at 23rd and M streets, that will include a new West End Fire Station, which was razed for that development. It’s called Square 50 and will also include Squash on Fire, a squash court facility and restaurant.